By means of TEM, SDP, 29Si NMR etc analysis, the behavior of the Polyethylene Oxide (PEO) Polypropylene Oxide (PPO) Polyethylene Oxide (PEO) as organic modifier on SiO2 sol gel in the basic media was investigated; the effects on sol particle growth and network &morphology control were discussed in detail, and then the model on sol particle growing was suggested on the basis of growth unit theory of anion coordinate polyhedron. The results showed that PEO PPO PEO additive limited particle growth but also restrained particle agglomeration and then made the SiO2 sol high stable. It was found that the action of EPE was similar to that of organic structure directing agent and made the sol cluster cross linked branch network.
The isopropylation of naphthalene with isopropanol over AlMCM- 48 mesoporous molecular sieves was studied. AlMCM- 48 showed high activity and shape selectivity to the isopropylation of naphthalene. Grafting aluminum on MCM- 48 improved its acidity. It was found that with the increasing of Al content, the performance of AlMCM- 48 catalysts for naphthalene conversion was enhanced. High naphthalene conversion of 89.5％ was achieved over AlMCM- 48 with Si/Al=5.3 under the reaction conditions:n(isopropanol) /n(naphthalene)=2, temperature T=250℃ , time t=4 h.
